Lr

Lawrencium · element 103

Actinide · Solid at room temperature

Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series.

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This is only an illustration, not lawrencium itself. Lawrencium can only be made in very small amounts and emits strong radiation
This is only an illustration, not lawrencium itself. Lawrencium can only be made in very small amounts and emits strong radiation - Chemical Elments A Virtual Museum under a Creative Commons Attribution 3.0 Unported License, source: https://images-of-elements.com/lawrencium.php

Key facts

Atomic mass
266 u
how heavy one atom is
Phase (room temp.)
Solid
Melting point
1900 K (1627 °C)
when solid turns to liquid
Period
7
its row in the periodic table
Group
3
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
1.3
how strongly it pulls electrons
Electron configuration
[Rn] 5f14 7s2 7p1
where its electrons live
Shells
2 · 8 · 18 · 32 · 32 · 8 · 3
electrons in each layer, inside to out
Discovered by
Lawrence Berkeley National Laboratory
who found it

Source: Wikipedia

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